I guess this one enters in irrationnal weird fear,, the Alarm system at home,, lol, I don't mind it by itself,, just when it goes off, or when I know it will have to. It's just so darn loud. It's enough that when we do some cooking and something gets burn enough, that I fear the fire alarm could go off, I get all shaky.
Something that's related, I fear robbers,, specially when I'm home alone at night/overnight (for the latter what is weird is that I'll put on the alarm system on, lol).